A strategy analyst asks Claude in a plain chat about competitors' pricing changes announced in the past month. The answers are confident but don't mention several announcements she knows about. Select the TWO most likely causes or fixes that apply.

Answer: A and C — A question about recent, multi-source news needs web search or research, not a plain chat answer. / She should ask for sources and verify the key claims, since confident answers without sources are not evidence of completeness or accuracy.

The output's limits match the tool's limits: a recent, multi-source question needs search or research, as in (a), and the results should be cited and checked, as in (c), because confidence doesn't show the answer is complete. (b) misreads a coverage gap as withholding. (d) repeats the same unsuitable approach and hopes for a different result.